It was the same thing with Vicky Cristina Barcelona, and I'm wondering if potentially interested people would find themselves turned off upon finding out just whose movie they've been lured into. It's the same sense of un-branding (non-branding? anti-branding?) that kept most passersby from realizing that Zack and Miri Make a Porno was a Kevin Smith joint, and really, if you're already past that title, is his presence in the trailers and posters going to keep you away?
If anything, might the name recognition lure a couple of more people to either film (not that Larry David fans probably aren't already fans of Woody Allen, and not that Kevin Smith films probably already know which new movie is his)? Have you ever been sold on a movie until you got a glimpse of the name at the helm? When? Where? Why?